Mountain Beaver Distress - Sounds Like?

[flysar]

I read a study done in the 80's regarding Western WA Bobcat stomach content and it reported that Mountain Beaver (large rodent looking critters) remains were found in 42% of the Bobcat sampled, next closest was Snowshoe Hare at 26%.

Has any one heard a Mountain Beaver distress sound?

What commercially produced caller sound does it sound closest to? 

I know this question has a lot of room for funnies but a couple honest answers would be great.

[alwinearcher]

When I was a kid living in port Angeles, our German Shephard used to kill them all the time..
Sounded about the same as when she killed the rabbits

[Cylvertip]

Any one know why they are called boomers?  Always wondered, but have never been able to track anything down on it.

[Lazzwarbird]

I have trapped mountain beavers for years. They seem to be fairly nocturnal. I haven't ever heard a sound out of one but the bobcat sure do love em. When checking traps it's not irregular to see a few bobcat!